Here is a link to a 1988 Rossin Catalog. As you will see, each model had different component packages from which to choose, so choose as you will. but choose wisely?

Additional pics are appreciated, but they are of the components, and of little use in identification of the frame. Please take some of the frame?

Is there an "X" after the "SL" stamped on the bottom bracket? It kind of looks like maybe, but then again, maybe not?

You'll note in the catalog Rossin offered models with SL and Cromor tubesets. The SL, if it is only an "SL," would suggest it is one of those.

The absence of "rippled" tubing, and the stamped "SL," would seem to rule out it being a Ghibli?